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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-04-27 22:31:10 (GMT) |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-07-26 17:04:40 (GMT) |
| commit | c9218b163959fafa76ffbee0baa3ef269838f410 (patch) | |
| tree | 50e840c0c61129f5bcd7223ffb21b3ba4e399afb /arch | |
| parent | ff69a4c855066592f9e293cff8f54813614dd544 (diff) | |
| download | linux-fsl-qoriq-c9218b163959fafa76ffbee0baa3ef269838f410.tar.xz | |
ARM: Allow selection HZ values
Allow users to configure the Hz rate on implementations which do not have
a fixed clock rate.
Whenever HZ_FIXED is not set through one of its "default" settings, the
user is allowed to select a tick rate from 100, 200, 250, 300, 500Hz
and 1kHz. This is slightly more choice than with the generic HZ
selection in kernel/Kconfig.hz (which only does 100, 250, 300Hz and
1kHz). The reason for including 200Hz is that a greater number of other
platforms want that via the fixed rate, and 500Hz just seemed to be a
better middle value than 300Hz (which is of course very close to 250.)
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/Kconfig | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index ba412e0..1e98740 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1614,13 +1614,49 @@ config ARCH_NR_GPIO source kernel/Kconfig.preempt -config HZ +config HZ_FIXED int default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \ ARCH_S5PV210 || ARCH_EXYNOS4 default AT91_TIMER_HZ if ARCH_AT91 default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE - default 100 + +choice + depends on !HZ_FIXED + prompt "Timer frequency" + +config HZ_100 + bool "100 Hz" + +config HZ_200 + bool "200 Hz" + +config HZ_250 + bool "250 Hz" + +config HZ_300 + bool "300 Hz" + +config HZ_500 + bool "500 Hz" + +config HZ_1000 + bool "1000 Hz" + +endchoice + +config HZ + int + default HZ_FIXED if HZ_FIXED + default 100 if HZ_100 + default 200 if HZ_200 + default 250 if HZ_250 + default 300 if HZ_300 + default 500 if HZ_500 + default 1000 + +config SCHED_HRTICK + def_bool HIGH_RES_TIMERS config SCHED_HRTICK def_bool HIGH_RES_TIMERS |